Metal roof for cars.



F. W. MARTIN.

METAL ROOF FOR CARS.

APPLICATION FILED 050.19. 1912.

1,155,596. Patented 00 5.5,1915.

ITNESSES ENTOR coLuMnm PLANOCIRAPH CO WASHINGTCIN. D.C.

any srarns arnnr orrron FREDERICK W. MARTIN, OF NEW YORK, N. Y.,.ASSIGNGR TO JOHN L. MGHUN, OF BROOKLYN, NEW YORK;

METAL noon rose cans.

Specification of Letters Patent.

Patented @ct. 5, 1915.

Application filed December 19, 1912. Serial No. 737,767.

To all whom it may concern:

Be it known that l, FREDERICK WV. MARTIN, a citizen of the UnitedStates, residing at the borough of Manhattan, in the city, county, andState of New York, have invented a certain new and useful Improvement inMetal Boots for Cars, of which improvement the following is aspecification.

This invention relates to. metal roofs for cars, and has for its objectto provide an improved joint construction for the adjacent side edges ofthe metal roofing sheets transversely of the car, by forming asubstantially trough shaped depression at the edge of one of the sheets,and bending the edge of the adjacent sheet, so as to drain into saidtrough. By this means the use of a separate drain trough located betweenthe edges of the roofing sheets is avoided, and the joint is renderedpractically impervious to moisture, while at the same time permitting acertain amount of play between the roofing sheets to allow forflexibility of the roof.

In the accompanying drawing: Figure 1 is a transverse section showingone form of joint embodying my improvement; and Fig. 2, is a similarsection showing my improvement employed with a trough shaped carline.

According to the construction shown in Fig. 1, the roofing sheets, 3,which are usually laid in a transverse direction across the car, aresupported on a wooden substructure, d, which may consist of roofingboards, purlins, or other members. A lateral drain trough, 6, is formedat the side edge of one of the roofing sheets, 3, by turning up theextreme edge, 7, and forming an upward projection or rib, 5, spaced ashort distance from the up-turned edge, 7, and substantially paralleltherewith.

The adjacent edge of the neXt roofing sheet is so formed as to draininto the trough, 6, by turning the edge of the sheet upward at 8, thenover and downward, as at 9, into the trough. Any water or moisture whichmay be driven over the rib, 5, from one side, or over the turned overedge, 9, from the other side, will fall into the trough, 6, and drainoff at the caves of the car. A sufiicient clearance may be left betweenthe projecting edge, 7, of one sheet, and the turned over portions, 8and 9, of the adjacent sheet to permit of a slight relative movement ofsaid sheets, and thereby give flexibility to the roof to allow for theweaving and twisting movement of the car during the running of thetrain.

For the purpose of protecting the trough and the overlapping edges ofthe roofing sheets, a cap, 10, may be provided preferably in the form ofan inverted U or trough having lateral flanges, 12, resting upon theroofing sheets.

If any rain or moisture is driven beneath the flanges, 12, of the cap,it may drain off through the space between the side wall of the cap andthe upwardly projecting portion of the roofing sheet, or if it should bedriven in with sufficient force to be carried over the projection, andfall into the trough portion, 6, such moisture may then drain offthrough said trough to the eaves of the car, and no water will passthrough the joint between the roofing sheets into the in terior of thecar.

As shown in Fig. 2, the roofing sheets are supported upon U shaped metalcarlines, 11, and the edges of the roofing sheets with the trough, 6,are located over the channel of the carline which would collect anymoisture that should by any chance pass through the joint between theroofing sheets.

By means of this improved construction, in which the trough is formed inthe edge of the roofing sheets, the use of a separate part for thispurpose is avoided, and the drain trough is always present at the properposition between the adjacent roofing sheets. This construction furtherserves to strengthen the roof as the sheets are much stiffer at theiredges.

Having now described my invention, what I claim as new and desire tosecure by Lettors Patent is 1. In a car roof, the combination with thesupporting members, of transverse metal roof sheets with overlappingside edges, one sheet having a turned up edge and a vertical rib spacedapart to form a lateral drain trough, and the edge of the adjacent sheetbeing turned up and over and down to drain into said trough, there beinga free clearance space between the vertical portions of saidover-lapping edges and a metal cap portion covering said trough.

2. In a car roof, the combination with a U shaped metal carline, oftransverse metal roof sheets with overlapping side edges, snptrough,there being a; free clearance space ported on said caglineso,l one roof1sheet hwbetween said over-lapping'edges.

mg a vertlca 1'1 an a turnec up' e ge" r forming a drain trough over thechannel in v FREDERICK MARE-IN? said carline, and the adjacent sheetbeing VVitness'es:

turned up and over and doWn to drain into WM. T. LANE, said trough, anda metal cap covering said M. G. DONOVAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. G.

